110kv Composite Insulator Suspension String Fitting

110kv Composite Insulator Suspension String Fitting

110kV composite insulator suspension string fittings are essential components in overhead transmission lines, providing mechanical support, electrical insulation, and structural stability for conductors. Designed to withstand high tensile forces, pollution environments, and dynamic loads, these fittings ensure long-term reliability in modern power grids. 110kV composite insulator suspension string includes a polymer (silicone rubber) insulator core with metal end fittings such as ball-eye, clevis, yoke plates, and suspension clamps. Compared to traditional porcelain or glass insulators, composite types offer lightweight structure, pollution resistance, and better anti-bending performance. Nooa Electric engineers these fittings to meet IEC and national utility requirements.
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Composite suspension strings use polymer insulators combined with specialized fittings to support conductors and maintain insulation on 110kV transmission lines.

Main Components of 110kV Composite Suspension String Fittings

The assembly includes polymer insulator rods, silicone sheds, metal end fittings, yoke plates, and line hardware designed to handle mechanical and electrical stress.


A typical 110kV composite suspension string consists of:

•  FRP/ECR fiberglass core rod – provides mechanical strength

•  Silicone rubber housing & sheds – enhances hydrophobicity and insulation

•  End fittings (ball-eye, clevis, socket, tongue, end cap)

•  Suspension clamp – supports and secures conductors

•  Yoke plates / clevis fittings – adjust hardware geometry

•  Corona/grading rings (when required)

•  Hot-dip galvanized steel hardware – corrosion-resistant and durable


Nooa Electric uses precision crimping and zinc-coating processes to ensure stable mechanical and electrical performance throughout the service life.

110kv Composite Insulator Suspension String Fitting

Performance Characteristics & Advantages

Composite suspension strings provide high mechanical strength, excellent pollution resistance, lightweight installation, and strong anti-fatigue properties.

1. High Mechanical Load Capacity
Typical mechanical ratings range from 70kN, 100kN, 120kN, to 160kN, depending on line design.
Composite rods provide higher tensile capacity with lower weight.

2. Pollution and Weather Resistance
Silicone rubber sheds maintain hydrophobicity, reducing flashover risks in coastal or industrial pollution environments.

3. Lightweight & Easy Installation
Composite insulators weigh only 30–40% of glass/porcelain types, making installation easier on long spans and mountain terrain.

4. Excellent Anti-Vibration & Bending Strength
The flexible FRP rod structure resists fatigue and minimizes conductor vibration impacts.

5. Long Service Life and UV Stability
Nooa Electric applies UV-resistant formulations and quality control to ensure durability in high-temperature and high-UV regions.

FAQ: 110kV Composite Insulator Suspension String Fitting

1. What is the typical length of a 110kV composite suspension insulator?
Usually 900–1800 mm, depending on creepage distance and pollution level.

2. Do 110kV composite strings require corona rings?
Often yes—especially for high-altitude or high-EMF regions to reduce corona discharge.

3. Are composite insulators better than glass for 110kV?
They are lighter, more pollution-resistant, and provide better anti-bending performance. Glass is favored in some areas for visibility and puncture resistance.

4. Can Nooa Electric supply complete hardware sets?
Yes. Nooa Electric provides fully assembled suspension strings or individual fittings.

5. What mechanical strength is typical for 110kV composite strings?
Common ratings: 70kN, 100kN, 120kN, 160kN, depending on conductor size and design.
Company profile

Who We Are?

Nooa Electric Co., Ltd. - Chinese professional electrical insulators manufacturer with 21+ experience, covering an area of 70,000 square meters, and construction area is 50,000 square meters. There are more than 200 employees, including 25 technicians. The production capacity 3500000 pieces per year, and now setting up the new kiln and lines up to 10500000 pieces per year. We have been specialized in research and development of latest high-strength functional glass and power transmission insulators, which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China, and is a participating unit of product standard formulation of the national electrical insulator standard committee.


What We Have?

Certificates & Reports: INTERTK, SGS, BV Certificates,Type Test Certificate.

Main Electric Insulators : Standard-type glass insulator (u40(ctv175)/u70(ctv254, ps70e)/u120/u160/u210/u300) , antipollution-type glass insulators (u120bp/u160bsp/u210bp), aerodynamic type glass electrical insulators (ug70bsa/u100bsa/u120bla), multi-umbrella type electric insulators, ground-wires type glass power line insulators (u70cn/u100cn/u120c), post insulator for line, pin glass insulator. Products are mainly used for transmission line insulation, suspension, support, tension conductors. They are divided into 5 major series: The standard type glass insulator 40-550kn, filth-resistant type glass insulators 70-420kn, aerodynamic type glass electrical insulators 120-300kn, multi-umbrella type electric insulators 120-300kn, and ground circuit type high voltage insulators, able to be used for line voltage from 10kv～1000kv.


Core Technology:

Automation Equipment: Siemens fully automatic feeding, stamping, temperature equalization, tempering, hot and cold shock control system.
Independent Product Model: U160BP/146/380/450, U160BP/155/380/450, U210BP/170/420/550 and U300BP/195/420/550.
Advanced Klin: Germany's new generation kiln control system, equipped with brand-new sensors and actuators, and equipped with a high-precision automatic batching system.
Qualification: Passed the quality, environment and occupational health system certification and obtained a number of invention patents.


Goal:

To be the world's largest glass insulators manufacturer.

Electric Insulators Certificates

Are u the electric insulators factory or trading company?
China Leading Electric Insulators Factory founded in 2002
What're your main power insulators?
Powerline Electric Insulators (glass insulators, porcelain insulators, composite insulators ), the fittings and hardwares of all kinds for high-voltage applications and related products.
Can I get some glass insulators samples?
Yes, powerline glass insulator sample order is available for quality check and market test.
What's your payment terms?
We usually accept all kinds of payment terms, T/T, L/C, Western Union.
How can you control your glass power line insulator quality?
For each glass insulator production processing, we have a complete QC system for the chemical composition, physical and electrical properties. After production, all glass power line insulators will be tested according to related standards, and the ex-factory test reports will be sent along with shipment documents.
Does your company accept customization?
We accept OEM service.
What's your warranty terms?
We offer 24 months warranty terms.
Do you have glass electrical insulators in stock?
Depends on your request, we have standard models (CTV254 & CTV175, U40B U70B U120B U160BL U240B U300B ) in stock. Some special product and big order will be newly produced according to your order.

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Contact Us

Room 2221, 22nd Floor, Building 1, Wanxiang Times Garden, No. 676, Renmin East Road, Furong District, Changsha City, Hunan Province, China
Phone : 0086 186-848-89358
Whatsapp : +8615274981317  
Email : info@nooaelectric.com
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